SUM-ERROR Roland Camm-1pro cx-300

[shv]

Hello Everyone,
I'm glad I found this forum, hope to find help here.
Thanks in advance to all.

I have a problem with Roland Camm-1pro cx-300.
At power on appear message:

SUM-ERROR
RE-WRITE MEMORY

i press enter and next message: WAITING...

i waiting, but nothing else happens...
if you know how to fix it, help please.

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[mfirdaus0708]

I never experienced this in the engine CX500, usually this problem can not be found on mainboardnya updated firmware.

Then I replace the mainboard & reinitialize

Hopefully this can help you

[callmrhandy]

Did this ever get solved? I just purchased a 500 and I'm getting same problem?

Thanks